JP4514250B2 - LCD panel frame holding mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a holding mechanism for a liquid crystal panel frame.
[0002]
[Prior art]
For example, an electronic device such as a camera is provided with a liquid crystal panel that displays various information (such as a shooting mode and the number of shots).
In such an electronic device, when the liquid crystal panel is disposed on the circuit board, the liquid crystal panel frame for holding the liquid crystal panel frame that extends along the outer periphery of the liquid crystal panel and contacts the outer periphery of the liquid crystal panel surface is provided. A holding mechanism is provided.
A conventional liquid crystal panel frame holding mechanism is configured as follows, for example. That is, an annular frame holding member that contacts the outer periphery of the back surface of the liquid crystal panel is provided on the circuit board, and the locking provided on the frame holding member side in a state where the liquid crystal panel is sandwiched between the frame holding member and the liquid crystal panel frame. The frame holding member, the liquid crystal panel frame, and the liquid crystal panel are integrally held by engaging the claws with the edges of the holes provided on the liquid crystal panel frame side.
The frame holding member is attached to the circuit board by, for example, disposing a fixing member extending along the circuit board on the surface opposite to the liquid crystal panel disposition surface of the circuit board. This is performed by providing a screw insertion hole penetrating through and screwing the screw into a screw hole provided on the frame holding member side through the screw insertion hole.
The liquid crystal panel frame is formed of a conductive material, for example, a metal plate, and the liquid crystal panel frame is connected to the ground line of the circuit board by a wiring member such as a lead wire in order to remove the influence of static electricity on the liquid crystal panel. ing.
[0003]
[Problems to be solved by the invention]
The conventional liquid crystal panel frame holding mechanism using the frame holding member described above has the following drawbacks.
First, in order to attach the frame holding member to the circuit board, a process for providing a screw insertion hole in the fixing member is required, which increases manufacturing costs.
Secondly, a wiring member such as a lead wire for grounding the liquid crystal panel frame is required, resulting in increased component costs.
Thirdly, the frame holding member is made of a material such as a synthetic resin having a low strength, and in order to secure the mounting strength of the frame holding member, the frame holding member is provided along the outer periphery of the liquid crystal panel, and a screw It is necessary to provide two or more fixing points. For this reason, the frame holding member itself and screw holes for attachment occupy space on the circuit board, and the space for mounting components is wasted.
The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide a liquid crystal panel frame holding mechanism capable of reducing the manufacturing cost and ensuring a wide space on a circuit board. There is.
[0004]
[Means for Solving the Problems]
The present invention is a liquid crystal panel frame holding mechanism for holding on a circuit board a liquid crystal panel frame that is in contact with the outer periphery of the surface of the liquid crystal panel, and is a conductive mechanism provided on the surface of the circuit board facing the liquid crystal panel. A locking member made of material, the locking member being soldered and fixed to the conductive pattern portion of the circuit board, the liquid crystal panel frame is formed of a conductive material, and the liquid crystal panel frame is A locking portion engageable with the locking member; and a biasing member that contacts the back surface of the liquid crystal panel and biases the liquid crystal panel from the back surface to the front surface, and the locking of the liquid crystal panel frame The urging member urges the liquid crystal panel from the back surface to the front surface while the portion is locked to the locking member, so that the liquid crystal panel is held in a state where the front surface is in contact with the liquid crystal panel frame. In front of the LCD panel frame In a state where the engaging portion is engaged with the locking member and the locking portion of the liquid crystal panel frame and the locking member is configured so as to be electrically conductive, said locking member, said liquid crystal The side of the panel, and in the thickness direction of the circuit board, is arranged in a space located between the surface of the liquid crystal panel frame and the surface of the circuit board facing the liquid crystal panel, The locking member has an intermediate portion that extends in parallel with the surface of the circuit board with a space therebetween, and leg portions that are provided at both ends in the length direction of the intermediate portion. The leg portion is fixed to the conductive pattern portion of the circuit board by soldering, and the locking portion of the liquid crystal panel frame is formed in a gap formed between the intermediate portion and the surface of the circuit board. It is configured to be inserted .
Therefore, firstly, unlike the conventional case, the frame holding member is unnecessary, so that there is no processing such as providing a screw insertion hole in the fixing member, and the manufacturing cost can be reduced.
Secondly, the liquid crystal panel frame can be grounded only by locking the first locking portion to the second locking portion, and a wiring member such as a lead wire for grounding the liquid crystal panel frame is not required, resulting in component costs. Can be reduced.
Third, since the frame holding member is unnecessary, the frame holding member itself and screw holes for mounting do not occupy space on the circuit board, and a sufficient space for mounting components can be secured. it can.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view showing a configuration of a liquid crystal panel frame holding mechanism according to an embodiment of the present invention, FIG. 2 is an explanatory view showing the state of FIG. 1 as viewed from the section AA, and FIG. 3 is a section of FIG. FIG. 4 is a perspective view showing a main part in the same embodiment. FIG. 5 is an explanatory view showing another embodiment.
[0007]
First, the configuration of the liquid crystal panel frame holding mechanism of the present embodiment will be described with reference to FIGS.
As shown in FIG. 1, the liquid crystal panel frame holding mechanism 1000 according to the present embodiment includes a liquid crystal panel frame 100, a liquid crystal panel 200, a pressure contact rubber 300 (corresponding to an urging member in claims), a circuit, substrate 400, a fixing member 500 is configured to include a etc. locking member 60 of zero.
[0008]
The liquid crystal panel frame 100 is made of a conductive material, for example, a metal plate, and has an annular upper wall 102 that forms a rectangular window 101 for facing the display surface 202 of the liquid crystal panel 200 outward, and an upper wall 102. Side walls 104 and 106 bent downward from the side edges of the short side, side walls 108 and 110 bent downward from the side edges of the long side of the upper wall 102, and locking claws provided on the side walls 104 and 106 and a 112,11 4.
[0009]
As shown in FIG. 4, the locking claw 112 has an arm portion 112 </ b> A extending downward from an intermediate position in the length direction of the side wall 104, and a lower end of the arm portion 112 </ b> A from the center of the liquid crystal panel frame 100. It is comprised from the nail | claw part 112B bent in the direction (direction substantially orthogonal to the extension direction of the arm part 112A) toward outward.
Similarly to the locking claw 112, the locking claw 114 also has an arm portion 114A extending downward from an intermediate position in the length direction of the side wall 106, and outward from the center of the liquid crystal panel frame 100 from the lower end of the arm portion 114A. It is comprised from the nail | claw part 114B bent in the direction (direction substantially orthogonal to the extension direction of the arm part 114A) which goes to.
And each latching nail | claw 112,114 is provided so that arm part 112A, 114A can be displaced elastically in the thickness direction.
[0010]
The liquid crystal panel 200 has a rectangular plate shape having a thickness, and is accommodated in an accommodation space formed by the inner surface 102A of the upper wall 102 and the inner surfaces 104A, 106A, 108A, 110A of the side walls 104, 106, 108, 110. In this state, the surface of the peripheral edge is in contact with the inner surface 102 </ b> A of the upper wall 102 of the liquid crystal panel frame 100. The liquid crystal panel 200 is in a state in which the display surface 202 faces outward (upward) through the window portion 101.
Note that a liquid crystal electrode for supplying power and signals for operating the liquid crystal panel 200 to the circuit board 400 via the pressure contact rubber 300 extends on one side in the longitudinal direction of the back surface 204 of the liquid crystal panel 200. ing.
[0011]
The pressure contact rubber 300 has a rectangular cross-sectional shape with a longitudinal direction in the vertical direction, and is formed with a uniform height over the entire length. One surface 302 in the height direction is pressed against the back surface 204 of the liquid crystal panel 200 and the other surface 304 is pressed against the surface of the circuit board 400, and the back surface 204 of the liquid crystal panel 200 is interposed between the liquid crystal panel 200 and the circuit board 400. It is arrange | positioned in the state extended along one side.
The pressure contact rubber 300 is formed such that a plurality of conductive rubbers extending through in the height direction and insulating rubbers that insulate between the conductive rubbers are alternately positioned in the longitudinal direction of the pressure contact rubber. Then, one surface 302 is press-contactable with a liquid crystal electrode (not shown) formed on the back surface 204 of the liquid crystal panel 200, and the other surface 304 is formed on a substrate electrode (not shown) formed on the surface 402 of the circuit board 400. The liquid crystal electrode and the substrate electrode are configured to be electrically connected to each other through the conductive rubber portions with the surfaces 302 and 304 being in pressure contact with the liquid crystal electrode and the substrate electrode, respectively. Has been.
[0012]
The circuit board 400 is disposed with the front surface 402 facing the liquid crystal panel 200 and the back surface 404 facing the fixing member 500.
The fixing member 500 is composed of a plate-like member extending along the circuit board 400, and holds the circuit board 400 with the front surface 502 facing the back surface 404 of the circuit board 400.
[0013]
On the surface 402 of the circuit board 400, conductive pattern portions 406 and 408 that are connected to the ground line (ground line) of the circuit board 400 are formed in the vicinity of the portions facing the locking claws 112 and 114 of the liquid crystal panel frame 100. ing.
The conductive pattern portion 406 is provided in two places on the straight line parallel to the side wall 104 and sandwiches the locking claw 112 in the middle. The conductive pattern portion 408 sandwiches the locking claw 114 in the middle on the straight line parallel to the side wall 106. It is provided in two places.
[0014]
As shown in FIG. 4, the locking member 600 includes an intermediate portion 602 extending in parallel with the surface 402 at a distance from the surface 402 of the circuit board 400, and the length direction of the intermediate portion 602. Are formed from a conductive material, such as a metal plate, which is bent downward from both ends thereof and has leg portions 604 extending in parallel with the surface 402 of the circuit board 400 outside the intermediate portion 602.
The leg portion 604 of the locking member 600 is fixed to the conductive pattern portions 406 and 408 on the surface 402 of the circuit board 400 by soldering. At this time, a gap 603 is formed between the intermediate portion 602 and the surface 402 of the circuit board 400 so as to face the locking claws 112 and 114. And the clearance gap 603 is comprised so that the nail | claw part 112B, 114B can be penetrated.
As is clear from FIG. 2, the locking member 600 is on the side of the liquid crystal panel 200 and in the thickness direction of the circuit board 400, the surface of the liquid crystal panel frame 100 and the liquid crystal panel 200 of the circuit board 400. It is arranged in the space A located between the facing surface 502.
[0015]
Next, a procedure for attaching the liquid crystal panel frame 100, the liquid crystal panel 200, and the pressure contact rubber 300 to the circuit board 400 will be described.
First, the pressure contact rubber 300 is placed so that its surface 304 faces the substrate electrode on the surface 402 of the circuit board 400.
Then, the liquid crystal panel 200 is held so that the liquid crystal electrode faces the surface 302 of the pressure contact rubber 300.
[0016]
Next, the liquid crystal panel frame 100 is placed over the liquid crystal panel 200 so that the inner surface 102 </ b> A of the upper wall 102 contacts the outer periphery of the surface 202 of the liquid crystal panel 200.
At this time, the liquid crystal panel frame 100 is positioned so that the locking claws 112 and 114 of the liquid crystal panel frame 100 are positioned at positions corresponding to the locking members 600 provided on the circuit board 400.
[0017]
By pressing the arm portions 112 </ b> A and 114 </ b> A of the locking claws 112 and 114 inward, the claw portions 112 </ b> B and 114 </ b> B are displaced to a position where they can be inserted into the gap 603 of the intermediate portion 602 of the locking member 600.
When the claw portions 112B and 114B are displaced to the positions facing the gap 603, the pressure on the arm portions 112A and 114A is released, so that the displacement of the claw portions 112B and 114B is released and the claw portions 112B and 114B are moved to the gap 603. Inserted and locked to the intermediate portion 602.
In this state, the intermediate portion 602 and the claw portions 112B and 114B are electrically connected. Therefore, the liquid crystal panel frame 100 is connected to the ground line of the circuit board 400 via the locking claws 112 and 114, the locking member 600, and the conductive pattern portions 406 and 408.
[0018]
In addition, the pressing rubber 300 is pressed between the liquid crystal electrode on the back surface 204 of the liquid crystal panel 200 and the substrate electrode of the circuit board 400 in a state where the locking claws 112 and 114 are locked to the locking member 600. The liquid crystal panel 200 is urged from the back surface 204 toward the front surface 202 by the action of the pressure contact rubber 300 so that the outer periphery of the front surface 202 of the liquid crystal panel 200 is in contact with the inner surface 102A of the upper wall 102 of the liquid crystal panel frame 100. Is retained.
Further, the dimension between the back surface 204 of the liquid crystal panel 200 and the front surface 402 of the circuit board 400 in a state where the locking claws 112 and 114 are locked to the locking member 600 is between the surfaces 302 and 304 of the pressure contact rubber 300. It is set to be smaller than the dimension.
Therefore, the pressure contact rubber 300 is pressed between the back surface 204 of the liquid crystal panel 200 and the substrate electrode of the circuit board 400, so that the outer periphery of the surface 202 of the liquid crystal panel 200 contacts the inner surface 102 A of the upper wall 102 of the liquid crystal panel frame 100. At the same time, the upper surface of the claw portion 112B of the locking claw 112 and the upper surface of the claw portion 114B of the locking claw 114 are pressed against the back surface of the intermediate portion 602 of the locking member 600. As a result, the claw portions 112B and 114B are locked with the locking claws 112 and 114 in a state where the claw portions 112B and 114B are prevented from moving in the gap 603 formed between the intermediate portion 602 and the surface 402 of the circuit board 400. Positioning with the member 600 is performed.
[0019]
In addition, when removing the liquid crystal panel frame 100 from the circuit board 400, the locking claws 112 and 114 may be pressed inward and displaced to release the locking with the locking member 600.
[0020]
Therefore, according to the liquid crystal panel frame holding mechanism 1000 of the present embodiment, the following operational effects can be obtained.
First, unlike the conventional case, since the frame holding member is unnecessary, there is no processing such as providing a screw insertion hole in the fixing member, and the manufacturing cost can be reduced.
Secondly, unlike the conventional case, the liquid crystal panel frame 100 can be grounded by simply attaching the liquid crystal panel frame 100 to the locking member 600, so that a wiring member such as a lead wire for grounding the liquid crystal panel frame becomes unnecessary. Parts cost can be reduced.
Thirdly, it is only necessary to secure a space for disposing the liquid crystal panel frame 100 and the locking member 600, and unlike the conventional case, the frame holding member is unnecessary, so the frame holding member itself and screw holes for attachment are provided. And the like does not occupy a space on the circuit board, and a sufficient space for mounting components can be secured.
[0021]
Next, another embodiment of the present invention will be described with reference to FIG.
In another embodiment shown in FIG. 5, an example in which a flexible substrate is used as the circuit substrate 400 is shown. In the above-described embodiment, the outer periphery of the surface 202 of the liquid crystal panel 200 is brought into contact with the inner surface 102A of the upper wall 102 of the liquid crystal panel frame 100 by the urging force of the pressure contact rubber 300. In other embodiments, however. The outer periphery of the surface 202 of the liquid crystal panel 200 is brought into contact with the inner surface 102A of the upper wall 102 of the liquid crystal panel frame 100 by an elastic force generated by bending a part of the flexible substrate.
[0022]
That is, a bent portion 406 is formed by bending a part of the circuit board 400, and a substrate electrode is provided at a location facing the back surface 204 of the liquid crystal panel 200 of the bent portion 406, and the substrate electrode and the back surface 204 of the liquid crystal panel 200 are provided. A pressure contact rubber 300 is disposed between the liquid crystal electrodes. Here, one surface 302 in the height direction of the pressure contact rubber 300 is in pressure contact with the liquid crystal electrode, and the other surface 304 is in pressure contact with the substrate electrode.
[0023]
According to the above configuration, the outer periphery of the front surface 202 of the liquid crystal panel 200 is pressed by the elastic force of the bent portion 406 of the circuit board 400 toward the front surface 202 so that the outer periphery of the front surface 202 of the liquid crystal panel 200 is The upper wall 102 is held in contact with the inner surface 102A.
In this case, as described above, the liquid crystal electrode and the substrate electrode are electrically connected through the conductive rubber portions in a state where the pressure contact rubber 300 is in pressure contact with the liquid crystal electrode and the substrate electrode. Further, as described above, the liquid crystal panel frame 100 is electrically connected to the ground line of the circuit board 400 by the locking claws 112 and 114 being locked to the locking member 600.
Of course, in such other embodiments, the same effects as those of the above-described embodiments can be obtained.
In the example of FIG. 5, the pressure contact rubber 300 is disposed between the circuit board 400 formed of a flexible substrate and the back surface 204 of the liquid crystal panel 200. However, the pressure contact rubber 300 is removed and the substrate electrode of the circuit board 400 is removed. And the liquid crystal electrode on the back surface 204 of the liquid crystal panel 200 may be configured to contact each other directly.
[0025]
【The invention's effect】
Holding mechanism of the liquid crystal panel frame of the present invention as apparent from the above description, the conductive locking part of the liquid crystal panel frame formed of a conductive material, provided on the surface of the side facing the liquid crystal panel of the circuit board in a state where the locked sexual material made of the locking member, and their engaging portions and the engaging member is configured so as to be electrically conductive.
Therefore, firstly, unlike the conventional case, the frame holding member is unnecessary, so that there is no processing such as providing a screw insertion hole in the fixing member, and the manufacturing cost can be reduced.
Secondly, the liquid crystal panel frame can be grounded only by locking the first locking portion to the second locking portion, and a wiring member such as a lead wire for grounding the liquid crystal panel frame becomes unnecessary. Parts cost can be reduced.
Third, since the frame holding member is unnecessary, the frame holding member itself and screw holes for mounting do not occupy space on the circuit board, and a sufficient space for mounting components can be secured. it can.
[Brief description of the drawings]
FIG. 1 is a plan view showing a configuration of a liquid crystal panel frame holding mechanism according to an embodiment of the present invention.
FIG. 2 is an explanatory view showing a state of FIG. 1 as viewed from a cross section taken along line AA.
FIG. 3 is an explanatory view showing the state of FIG. 1 as viewed from the cross section of the BB line.
FIG. 4 is a perspective view showing a main part in the same embodiment.
FIG. 5 is an explanatory diagram showing another embodiment.
[Explanation of symbols]
1000 Liquid crystal panel frame holding mechanism 100 Liquid crystal panel frames 114 and 116 Locking claws 200 Liquid crystal panel 300 Pressure contact rubber 400 Circuit board 500 Fixing member 600 Locking member

Claims (7)

A liquid crystal panel frame holding mechanism for holding a liquid crystal panel frame in contact with the outer periphery of the surface of the liquid crystal panel on a circuit board,
Comprising a locking member made of a conductive material provided on the surface of the circuit board facing the liquid crystal panel, and the locking member is soldered and fixed to the conductive pattern portion of the circuit board;
The liquid crystal panel frame is formed of a conductive material, and the liquid crystal panel frame has a locking portion that can be engaged with the locking member;
An urging member that abuts the back surface of the liquid crystal panel and urges the liquid crystal panel from the back surface to the front surface; and the attachment portion in a state where the engagement portion of the liquid crystal panel frame is engaged with the engagement member. The urging member urges the liquid crystal panel from the back surface to the front surface, whereby the liquid crystal panel is held in a state in which the front surface is in contact with the liquid crystal panel frame,
Wherein the locking portion of the liquid crystal panel frame and the locking portion of the liquid crystal panel frame in a state engaged with the locking member and the locking member is configured so as to be electrically conductive,
The locking member is located on the side of the liquid crystal panel and between the surface of the liquid crystal panel frame and the surface of the circuit board facing the liquid crystal panel in the thickness direction of the circuit board. Placed in a space to
The locking member has an intermediate portion that extends in parallel with the surface of the circuit board with a space therebetween, and leg portions that are provided at both ends in the length direction of the intermediate portion. The leg portion is fixed to the conductive pattern portion of the circuit board by soldering, and the locking portion of the liquid crystal panel frame is formed in a gap formed between the intermediate portion and the surface of the circuit board. Configured to be inserted,
A holding mechanism for a liquid crystal panel frame. The biasing member has one surface in the height direction pressed against the back surface of the liquid crystal panel and the other surface pressed against the surface of the circuit board, and the back surface of the liquid crystal panel between the liquid crystal panel and the circuit board. 2. The holding mechanism for a liquid crystal panel frame according to claim 1 , wherein the holding mechanism is made of a pressure contact rubber extending along one side of the liquid crystal panel frame. The pressure contact rubber is formed such that a plurality of conductive rubbers extending through in the height direction and insulating rubbers that insulate between the conductive rubbers are alternately positioned in the longitudinal direction of the pressure contact rubber. One surface is in pressure contact with the back surface of the liquid crystal panel, and the other surface in the height direction is in pressure contact with the surface of the circuit board. The liquid crystal panel frame holding mechanism according to claim 2, wherein the circuit board is electrically connected to a surface of the circuit board. The urging member is composed of a flexible substrate that comes into contact with the back surface of the liquid crystal panel in a bent state, and the urging force from the back surface to the front surface of the liquid crystal panel by the urging member is bent. The liquid crystal panel frame holding mechanism according to claim 1 , wherein the holding mechanism is formed by an elastic force of the liquid crystal panel frame. The liquid crystal panel frame holding mechanism according to claim 4, wherein the flexible substrate constitutes a part of the circuit board. The flexible substrate according to claim 4 or 5 liquid crystal panel frame holding mechanism, wherein that are electrically connected at a place in contact with the liquid crystal panel. Said locking member is the circuit according to claim 1 to the liquid crystal panel of the holding mechanism according to any one of the 6, characterized in that it is electrically connected to a ground line of the substrate.

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